<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title> 
    <style>
        .yeye{
            width: 800px;height: 800px;
            background-color: hotpink;
            position: relative;
            padding: 50px;
        }
        .father{
            /* 给父亲加定位 */
            /* position: relative; */
            width: 500px;
            height: 500px;
            background-color: skyblue;
        }
        .son{
            position: absolute;
            left: 30px;
            bottom: 10px;
            width: 200px;
            height: 200px;
            background-color: rebeccapurple;
        }
    </style>
</head>
<body>
   <div class="yeye">
    <div class="father">
        <div class="son">
        </div>
       </div>
   </div>
</body>
</html>